Some 24.6 million Americans had asthma in 2009, up from 20.3 million at the beginning of the decade, according to a new report from the Centers for Disease Control and Prevention.
Asthma, a chronic respiratory disease, affected 8.2% of all U.S. residents in 2009, up from 7.3% in 2001, an increase of 12.3%, the CDC said. Children were more prone than adults to have asthma, and women more than men. African-Americans were affected at higher rates than other ethnic groups. About half of persons with asthma reported having an asthma attack in the preceding 12 months, the CDC said.